Jig used in the manufacture of piano plates



Dec.,26,1922. 1,440,040. H. A. WAHLEN.

JIG USED IN THE MANUFACTURE OF PIANO PLATES.

FILED JUNE 9.1921. 2 SHEETS-SHEET 1.

gwuemto z Hal-1m A.Wah1an Dec. 26, .1922. 1,440,040.

H. A. WA H LE N.

HG USED IN THE MANUFACTURE OF PIANO PLATES.

FILED JUNE 9.1921. 2 SHEETS-SHEET 2.

10 i i I I 25 w 5 :iliiijiilg .l/lxliln 1 18 I I if figs,

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gwuewioz Patented Dec. 2%, i922.

stares Haney A. tvaiinnn, or RACINE, Wisconsin.

are risen in rnn MANUFACTURE orrrano rtarns.

a ncanon filed June 9, 1921.

To (ZZZ 20/1 om may concern. i

Be it knownthat I, HENRY A. VVAHLEN, a citizen of the United States, residing at Racine, in the county of Racine and btate of lVisconsin, have invented certain new and useful Improvements in Jigs Used in the Manufacture of Piano Plates, of which the following is a specification.

This invention relates to molding appara tus and more particularly to apparatus for molding piano plates and the primary object of the invention is to provide novel means for setting the pins in the mold, so that they will be cast in during the molding process thereby eliminating the time and trouble heretobefore experienced in placing the pins in position and the necessity of employing skilled labor for this purpose.

Another object of the invention is to provide a novel jig or frame for supporting the pins in their correct position in relation to each other and a novel means for holding the pins against accidental displacement, while the jigor frame is being placed in position and a novel means for releasing the pins and for forcing the same into place in the mold.

A. further object of the invention is to provide a novel means for supportingthe jig in the mold while the pins are being forced in position, said means being carried by the pattern and held in place inthe mold by the ramming of the green sand during the forming of the impression.

A still further object of the invention is to provide an improved jig, for holding a plu rality of pins, studs, or the like for placing the some in position in a mold, so that the pins, studs, bolts or the like can be cast in the casting during the molding operation, of the above character, which is durable and efficient in use, one that is simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

l Vith these and other objec'ts in view, the invention consists in the novel construction, arrangement and foi'mationof parts, as Will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, forming apart of this specification, in which drawings. t

Figure l is a side elevation of the improved or frame.

Fig. 2 a plan view of the push plate uti lized for forcing the pins in position in the mold.

proved jig or frame studs, or the like, which 7 Sean No. 476,342.

Fig. 3 is a the pins.

Fig. 4 is a plan view of the pins.

Fig. 5, is a detail transverse section taken on the line 5-5 of Figure 6, illustrating the means of connecting the guide pins and the plan View of the lock plate for the guide plate for supporting brackets to the ido plate.

F 1g. 6 is a top plan view of the improved g on frame, showing portlons thereof broken away. i 1g. 7 1s an (enlarged endelevation of the mprove igpshow ng the same in position in a mold for forcing the .pinsinto the same, the mold belng shown in fragmentary section. i i

Fig. '8 is a detail transverse section through the improved lg'orframe talcenon the line 8-8o1t Figure 6. L Fig. 9 1s a deta l transverse section throughthe improved jlg taken on the line 9-9 of Figure 6.

talent Figure lOisa transverse section taken on i the line 1'010'ofFigure 6, and

Fig. 11 is an enlarged detail ,7 perspective view of oneof the guides utilized for receiving the guide frame;

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter A indicates the imin the mold C; and designates the guides utilized for receiving the guide pins carried by the jig. l

The improved jig A. .indrules a longitudinally extending guide or base plate 15 which is provided with a plurality of openings 16," which are adapted to receive the pins, which aretobe forced in the mold for attachment to the piano plates- The openings 1.6 can be of any suitable configuration in order to conform to the shape of the pins, are to be forced into the mold and these openings also can be arranged in any desired formation, so that the pins, studs or other oevices to be cast inthe casting will proj ectthere from in the desired pattern. The jig as shown is particularly adapted for placing the pins of'piano plates in position and the openings therefor are cylindrical shaped in cross ranged in two rows, which are positioned in stepped relation to each other as can be pins carried by the jig or for setting the pins B section and a'r-.

' of the drawings.

6 receive the stems v1% 20. These brackets or supporting members i are of a substantially ing feet 21. It can be ranged seen by referring to Figures 1 and 3 The rows of openings 16 terminate short of the terminals of the plate 15 and the plate adjacent to its opposite ends is provided with openings 17, which are arat the longitudinal center of the These openings of guide pins19, the purpose of which, will be hereinafter .more fully lescribed. The stems 18 project through the upper surface ofthe plate 15 clearly plates.

and receive the supporting legs or brackets V-shape and are provided with outwardly extending support seen that; these members form a support for the plate 15 of the jig, when the same isplaced in an inverter position ready for loading or receiving the,

The plate 15 is also provided adjacent pins.

22 and 23 to its outer ends with openings and socket openings 2 1, the purpose of which will be hereinaftermore fully described.

While the plate 15 has been shown with an outer plane face it is to be understood that the same can be shaped to conform to the configuration of the impression in the mold w1thwh1ch it is to be used.

- it looking and guiding plate 25 1s arupper surface of the plate 15 and this plate terminates short of the ends of the plate 15. v The plate 25 is also provided with the rows of-pin receiving openings 26 and out of alignment with the pin openings 16 formed in the plate 15, as will be here-. inafter more fully described. The plate 25, at the longitudinal center thereof is provided with a. plurality of relatively large guide openings. 27, which are adapted to extend above the socket, openings '24.. The plate is also provided adjacent to its ends with relatively large openings 28, which. are positioned above the openings 22, and-formed in the plate 15.

T he'pusher plate 28 is arranged above the locking and guiding plate 25 and is of substantially the same length and has its terminal provided whichare arranged in direct alignment with the openings 22 and 23. 1

These openings 22, 23 and-29 are adapted to rotatably supportthe bolts or operating ranged on the members 3O, which have eccentrics 31 formed thereon. These eccentrics 31' are mounted within the openings 28 formed in the plate 17 are adapted to which. are adapted to be brought nto with bearing opemngs 29,

can be readily turned. It is also to be noted that the pusher plate 28 is slidably mounted on the bolts 30 for movement toward and away from the plates 15 and 25. The plate 28 can be either made in one piece or in a plurality of sections 33 as shown. Where there is a number of'pins to be placed intotlie mold it is preferable that the plate 28 be formed in sections, as shown, in order that portions of the plate may be pushed down independently of the other portions in order to prevent the forcing of the mold out of shape. As shown the sections 33 are pr0- vided with suitable interfitting tongues and notchesB-i and 35. The plate 28 is pro-. vided at its longitudinal center with a row of guide openings 36 which are adapted to slidably receive the guide posts 37, which are anchored in the openings 24: in the lower plate. 15. These guide posts 37 extend through the openings2'7, which are formed relatively large in order to permit movement of the plate 25 in respect to the guide posts. 1

The guides D are'of substantiallycylindrical frusto-conical formation, but it is to be understood that the same can be of any desired shape and the same are provided with the longitudinally extending bores 38, which terminate short of one of the ends thereof, for receiving the guide pins 19.

In use of the improved jig or frame, the is placed in an inverted position so as to rest on the supporting feet 21 and the bolts 30 are operated so as to move the plate 25 to such position that the openings 26 thereof will align with the opening 16 in the plate 15. The pins B, in with the piano plate are placed through the aligned openings 16 and same come into engagement with the inner surface of the pusher plate 28. After the jig or frame has been loaded the bolts 30 are again actuated so as to move the plate so as to dispose the openings 26 thereof out of alignment with the openings 16 of the plate 15. This will move the pins B away from the openings 16, which effectively retains the pins B in position against accidental displacement.

The guides D are set on the pattern at the desired distance apart, that is the dis-. tance between the pins 19 formed on the jig and if so desired the pattern may be provided with suitable guides or guide pins (not shown in the drawing) for the guides D. The green sand is then placed around the pattern, and after the impression is made, the pattern is removed in the ordinary manner leaving the guides D embedded in the green sand. 7 y

' The jig or frame A is then grasped in the hands of the user and the guide pins 19 slid into the bores 38 of the guides D. The plate 8 is then actuated inorde to 26 until the 1 or i tring pins" in place on *3 into the mold. ZRt'lOH of ed so as to move the guide and locke' in order to brini as a; in into alignment with the openings 16. .f can heseenthat the plate 15 is plr ed 'n engageniient with one face otthe 'mpie -on in-the mold and that thepins ma he readily forced into the mold by the plate The pins Wi llproject out oi the mold into the impression, a distance equal to the thi'clniess oi. the plates 15and 25 the pins have been forced into them the jig is removed as Well the i i and-suitable plugs are inserted in the holes in' the inoldlett hy the guides. The hot metul is thenpoured into the mold in the usual manner and it can be seen that the pi; will be cast in with the piano plate. From the foregoing description, it can be seen that-a novel and simple device has been i provided for easily placing piano piano plates during the casting thereof, "thereby eliminating the ditliculty and trouble heretofore expert enced in placing the pins in position and permitting the pinsto be placed in position by unskilled labor. hanges in detailsmay be made Without departing from the spirit or scope of this invention, but What I claim as new is,

1. A .jig for placing pins in position in a mold comprising a guide plate, guide pins carried by the plate, the guide plate having a plurality of string pin receiving 0penings formed therein, and a, pusher plate slidably associated with the guide plate for engaging the string pin to force the same through the openings in the guide plate.

2. A jig for forcing pins into position in a mold comprising a" guide plate having a plurality of guide openings therein for re yeiving the pins, guide posts carriedby the plate, a pusher plate slidably mounted upon the guide posts arrangedlor movement toward and away from the guide plate tor it'orcing the pins through the guide,

openings therein, and by the guide plates.

3-. A jig for placing pins into position in a mold utilized -for casting of piano plates guide stems carried comprising a guide plate having a plurality ot pin receiving openings formed therein,

1 "istanding guide plate, locking andguide plate upon the posts and arranged adjacent to the first mentioned guide plate and having a plurality posts carried by the guide out openings formed therein a ted to be brought into and out of alignment. with the pin openings formed in the first mentioned guide plate, and a pusher plate carried by the guide posts and ar- .ior movement toward and awayfroin locking and guide plate.

It jig for forcing string pins for piano Prior ,tO' the-plate the bolts 30 the openings mounted 111g of placing plates inoldin correct formation com- Jl-lSlII a guide: Jlate havin a lurallt oi l b is openings formed therein toreceive the string legs carried by one face oi the plate and guide stems carried by the opposite lacejot' plate, a pusher plate arranged for movement toward and away from the guide plate, bolts hy the pusher and guide plates, the guide plate being also slidahly mountedupo'n the bolts, eccentrics secu'redto theholts, a locking and guide plate arranged adjacent toithe inner surface of the first mentioned guide plate having a plurality of string pin receiving openings formed therein adapted to be moved into and out of alignment with the string piirreceiving opening formed in the first-mentioned guide plate, the guide and locking plates having enlarged openings formed therein arranged to receive said eccentrics.

5,111 for forcing piano string pins in position in a mold torcasting piano plates, an elongated guide plate havinga plurality of string pin receiving openings formed therein, a pair of rotatable bolts carried by one face of the plate, eccentrics secured to the bolts, an elongated guide and locking plate arranged adjacent to the inner surface of the first mentioned guide plate havinga plurality of string pin receiving openings formed therein arranged for movement into and out of alignment With the string pin receiving openings formed in the first mentioned guide plate, the guide and locking plate having enlarged openings formed therein arranged to receive the eccentrics, a sectional pusher plate slidably mounted upon the. bolts arranged for movement toward and away from the guide and locking plate, and a plurality of guide posts secured. to the first mentioned guideplat-e, the pusher plate having openings formed ther in arranged to snugly and slidahly receive the guide posts, and the guiding and locking plates having enlarged openings therein arranged to receive the posts.

6. .A jig for placing position in a mold tor-casting piano plates comprising in combination an elongated plate having a plurality of string pin guiding openings formed transversely therethrough, guide stems carried by said plate extending from one face thereof with their axes parallel to the axes 01 said pin guiding openings, means for moving the string pins, in the guiding openings of said plate so as to project, them from the same side of said plate as said guide stems, and detachable guides for said guide pins adapted to be dis posed in the mold.

7- That step in the in a mold for pins, supporting method of placing pins casting piano plates consistides on the pattern, ramming the sand aroundv the pattern and rotatably carried piano string pins in stems in engagement with one larged openlngs v with the string & 7

guides, having guide face of the impression Withthe stems in'tlie guides, the jig supporting aplurality of pins, pushing the pins in the mold, and removing the guides and jig, leaving the pins in the mold.

S. A jig for forcing string plates in'a mold in correct formation comprising a guide plate having a, plurality of openings formed therein to receive the string pins, a pusher plate arranged for movement toward and away from the guide plate, lioltsrotatably carried by the pusher and guide plates, eccentrics secured to the bolts, a locking and guide plate arranged adjacent to-the inner surface oi thefirstmentinned guide plate having a plurality of string pin receiving openings formed therein adapted to move into and outoi alignment pin receiving openings formed in the first mentioned guide pla-te, the guide and locking plates having eniformed therein arranged to receive said eccentrics.

and, placing a jig 9. A jig for placing pins in position in a mold,- comprlsing a gulde plate having a plurality of pin'guiding openings therein,

pins for piano movable toward said to move the pins a. pusher plate movable toward said guide plate adapted to move the pins in said openings therein, and means for steadying said pins between said guide andpusher plates.

10. A jig for. placing a mold comprising a gu deplate havlng a plurali y of pin guiding openings therein,

a pusher plate movable toward said guide plate adapted to move the pins insaid openings ilk-316111 guide posts carried by said guide plates associated withf said pusher plate to guideit in its 'i'novenient; toward said guide plate and nine plane parallelto tlie'axesoi said pin guiding openings there in, and means for steadying said pins hetween said guide and pusher plates.

11.. A'jig for placing pins in a prising a guide plate having aplurality of pin guiding openings therein a pusher plate guide plate adapted in said openings therein, and guide, posts carried by associated with said pusher plate to guide it in its movement toward 'saidyguide plate andin a plane parallel to the axes of said pin guiding openings therein.

, p a HENRY A.'VVAHLEN.

pins in position in mold coma said guide plates 

